Flue gas desulfurization
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Let’s discuss the issue of flue gas desulfurization. We use alkaline solutions to neutralize sulfur dioxide in the flue gas, and the desulfurization effect is good. However, one problem we face is the treatment of the wastewater after desulfurization; its COD level is high and does not meet the design parameters. Does anyone have any good methods to reduce the COD level? Please share your ideas. Thank you
For large-tonnage boilers, wastewater can be used to replace part of the alkaline solution in order to reduce operating costs； The specific wastewater can be treated in two ways: 1. One part is added to the ash pit of the boiler and on top of the coal pile ； 2. The remaining portion must be treated through a wastewater treatment system; it is advisable to use the coking wastewater treatment method ；
The ash wash water should be reusable, right? ! Finally, it can be treated at a sewage treatment station or a wastewater plant! ! If it really doesn’t work!
Are there any ways to reduce COD levels to below 60, so that the water can be discharged into the sea? What oxidants work well for oxidizing sodium sulfite?
Dear seniors, could you please teach me how to perform the material balance calculations for limestone-gypsum flue gas desulfurization? Thank you
1. Liquid caustic is used as a desulfurization agent; during the absorption process, sodium sulfite is formed, and the resulting COD levels are naturally very high when discharged directly； 2. The air aeration oxidation process can be considered the most effective and cheapest treatment method. The most accurate product is sodium sulfate. 3. The method for calculating the amount of oxidizing air can be consulted with Ou.
7# liu-jh218: Can compressed air aeration reduce COD to 50?
7# liu-jh218 would like to ask further about the person on floor 7 – how can I get in touch with you?